Process of and apparatus for mixing powdered substances or highly-concentrated solutions with a liquid or dissolving them in the latter.



h W. LOEBEL & K. FRANZ. PROCESS OF AND APPARATUS FOR MIXING POWDERED SUBSTANCES 0R HIGHLY GONGENTRATED SOLUTIONS WITH A LIQUID 0R DISSOLVING THEM IN THE YLATTER.

APPLICATION FILED DBO. 11 1911.

Patented June 2, 1914.

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WALTER LOJEBEL, or LEIPZJtG, am) KUNO FRANZ, F Friar?ituonT-oNwHn-amnv,

GERMANY. I

PROCESS OF AND APPARATUS FOR MIXING POl/VDEIREJD SUBSTANGIES fli t HIGHLY- GONCENTRATEID SOLUTIONE; "WITH A. LIQUID 0R DISSOLVING THEM IN THE LATTJER.

incest i.

Specification of Letters Patent.

Application filed December 11, 191i. .Qerial No. 665,115?

Patented June rare.

1/}, all whomit may (roman) l ic it known that we, Wuxrcu LOX-181th, e1.-

gineer, and KuNo FRANZ, chemist citizens of the .lhnpire of Germany, residing at Leipzig and l ranktort-on-tlic-Main, .lermany, respectively, have invented certain new and useful improvements in processes of and apparatus for mixing powdered subst ances or b ighl v concentrated solutions with a liquid or dissolving; them in the latter, of which the following is a specification.

For the purpose of thoroughly mixing powdered substances with liquids, or for dissolving them therein, there are now used various forms of mechanical agitating-upparatus. 'lhese have however the drawback that the substances to be mixed or dissolved deposit on the agitators, which; must be thoroughly cleaned whenever there is to be treated, in the same apparatus, another different substance which it is not permissible to con taminale with the one previously treated. Furthermore. some substances thus treated tend to float on the surface of the liquid, requiring a complicated construction of the agitator. Now, in order to avoid these drawbacks which, especially when the substances to he treated are often changed, cause great inconvenience and unnecessary expense, we proceed according to our present invention in the followin manner: W e use a mixing-jet (nozzle) tor thoroughly l'nixing the respective substance and liquid,- which may he worked, as required, either by steam, or by the liquid itself, put under a certain pressure. in order to mix in the powdered substances floating on the surface of the. liquid, it is important to place the aspiratiug side of the mixing-jet at the level of the surface of the liquid or near to it, the

delivery jet acting in a downward direction. 'lhusa thorough. circulation of the liquid and ot the substance to be dissolved is obtained. Especially, the jet, acting downward. causes a strong whirling ot' the liquid near the bottom of the vessel. We either arrange the mixing-jet so that it can be elevated lind lowered, or, in case of a Fltationarv mixing-jet, we so construct the vessel in which the mixing or solution is to be etlected that it can be elevated or lowered relative to the mixing-jet. For this purpose, the vessel may he placed on a table the. pos1-- adapt them in each special case to the re quiren'lents ot' the manufacture.

It is advantapwns to use a vessel with a spherical bottom, which facilitates the cir culation of the liquid.

In cases where heat must be applied for mixingand dissolving, there maybe used as the motive-fluid of the mixing-"jet, either steam, or the liqui itself, which for that purpose put. under pressure and, if required, he ed. In cases which do not per mit the heating oi the liquid, there is used for the working of the mixing-jet the liquid itself, in combination with a pump and at. a suitable temperature.

The preferred apparatus-is shownin the accompanying drawing, in which the figure is a side elevation with the mixing-vessel in section.

The vessel 1. having a concave bottom 2, is supported lily legs on a vertically-adjust able table t. This tableis carried by cylindrical standards 5, 5', which, are arranged to slide vertically in fixed tubes 6. The lower portion of the central standard 5 has a thread 7 receiving a bevel-gear out 8, driven by another bevel-gear 9 through a shaft 10, sproolwt-chain '11 and wheel 12, and crank 12-3. The jet-pinup, which is arrz'inged in the upper part (it the vessel 1, comprises a conical nozzle t l, which is the lower end of a steam-supply pipe 15, and a concentric conoidal easing, or converging-iiiverging oon'ihining tube, 16 having inlet ports 17 Pipe 15 is connected by a fiexi le pipe 18 to a fixed pipe I!) having a control-valve 20. Pipe 15 carries a rack 21, actuated by a pinion 22 and hand-wheel 23, for adjusting the position of the jet-pump. which is nornmlly arranged with its inlets l7 substantiallv at the surface 24 ot the body of liquid in the vessel. When steam or other motive-fluid under pressure is supplied through pipe 15, the powdered floating or other substance to be .inixcd or dissolved is drawn, with portions of the liquid, into'the ports 17 and the mixture is forcibly jetted downward into the body of liquid. A vigorous circulation and mixing is thereby effected, the lines of flow being indicated in a general mannerby the arrows. 1

The invention is applicable to the mixing both of powdered substances and highlyconcentratedv solutions with liquids,'either to produce a permanent mixture or emulsion, or a solution. a

Having now particularly descrilded our invention, what we claim is: i

l. The process of mixing substances with a liquid or dissolving them therein, which consists in repeatedly drawing the substance and liquid from near the surface of a body of the.liquid, and jetting them vertically downward into the body of the liquid.

2. The process of mixing substances with a liquid or dissolving them therein, which consists in repeatedly drawing the substance and liquid along converging lines from near the surface of a body of the liquid, and jetting them vertically downward into the body of the liquid. I

- 3. Apparatus for mixing substances with a liquid or dissolving them therein, comprising a vessel for holding a body of the liquid, and a jet-pump vertically mounted in said vessel, said jet-pump constructed and arranged to draw the substance ,and liquid from near the su'rfacejof the liquid and to jet them, downward ihto the body of'the same. i i

4. Apparatus for'gnixing substances with a liquid or dissolving them therein, comprising a vessel for holding a body of the liquid, and a jet-pump axially mounted in said ves sel, said jet-pump constructed and arranged to-draw the substance and liquid from near the surface of the liquid and to jet them vertically downward into the body of the liquid, said jet-pump and vessel being relatively vertically adjustable.

5. ',Apparatus for mixing substances with a liquid or dissolving them therein, comprising a vessel for holding a body of the liquid,

and a jet-pump vertically mounted in said vessel, said jet-pump provided with a 0011- erging-diverging combining tube, and constructed and arranged to draw the substance and liquid from near the surface of the liquid and to jet them vertically downward into the body of the same.

6. Apparatus for mixing substances with i a liquid or dissolving them therein, comprising a cylindrical'vessel for holding a body of the liquid, said vessel having a concave bottom, a jet-pump vertically mounted in the axis of said vessel, said jet-pump construt-ted and arranged to draw the substance and liquid from nearthe surface of the liquid, and to jet them vertically downward into the body of the same.

In testimony whereof, we aiiix our signatures in presence of two witnesses.

WALTER LOEBEL. KUNO FRANZ. Witnesses as to Walter Loebel:

RUDOLPH FRIOKE, ARTH. Hluinas. .Wit-nesses as to Kuno Franz:

JEAN GRUND, CARL GRUND. 

